1*11be35a1SLionel Sambuc /* $NetBSD: t_random.c,v 1.3 2012/03/29 08:56:06 jruoho Exp $ */
2*11be35a1SLionel Sambuc
3*11be35a1SLionel Sambuc /*-
4*11be35a1SLionel Sambuc * Copyright (c) 2012 The NetBSD Foundation, Inc.
5*11be35a1SLionel Sambuc * All rights reserved.
6*11be35a1SLionel Sambuc *
7*11be35a1SLionel Sambuc * This code is derived from software contributed to The NetBSD Foundation
8*11be35a1SLionel Sambuc * by Jukka Ruohonen.
9*11be35a1SLionel Sambuc *
10*11be35a1SLionel Sambuc * Redistribution and use in source and binary forms, with or without
11*11be35a1SLionel Sambuc * modification, are permitted provided that the following conditions
12*11be35a1SLionel Sambuc * are met:
13*11be35a1SLionel Sambuc * 1. Redistributions of source code must retain the above copyright
14*11be35a1SLionel Sambuc * notice, this list of conditions and the following disclaimer.
15*11be35a1SLionel Sambuc * 2. Redistributions in binary form must reproduce the above copyright
16*11be35a1SLionel Sambuc * notice, this list of conditions and the following disclaimer in the
17*11be35a1SLionel Sambuc * documentation and/or other materials provided with the distribution.
18*11be35a1SLionel Sambuc *
19*11be35a1SLionel Sambuc * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20*11be35a1SLionel Sambuc * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21*11be35a1SLionel Sambuc * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22*11be35a1SLionel Sambuc * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23*11be35a1SLionel Sambuc * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24*11be35a1SLionel Sambuc * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25*11be35a1SLionel Sambuc * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26*11be35a1SLionel Sambuc * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27*11be35a1SLionel Sambuc * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28*11be35a1SLionel Sambuc * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29*11be35a1SLionel Sambuc * POSSIBILITY OF SUCH DAMAGE.
30*11be35a1SLionel Sambuc */
31*11be35a1SLionel Sambuc #include <sys/cdefs.h>
32*11be35a1SLionel Sambuc __RCSID("$NetBSD: t_random.c,v 1.3 2012/03/29 08:56:06 jruoho Exp $");
33*11be35a1SLionel Sambuc
34*11be35a1SLionel Sambuc #include <atf-c.h>
35*11be35a1SLionel Sambuc #include <stdio.h>
36*11be35a1SLionel Sambuc #include <stdlib.h>
37*11be35a1SLionel Sambuc
38*11be35a1SLionel Sambuc /*
39*11be35a1SLionel Sambuc * TODO: Add some general RNG tests (cf. the famous "diehard" tests?).
40*11be35a1SLionel Sambuc */
41*11be35a1SLionel Sambuc
42*11be35a1SLionel Sambuc ATF_TC(random_same);
ATF_TC_HEAD(random_same,tc)43*11be35a1SLionel Sambuc ATF_TC_HEAD(random_same, tc)
44*11be35a1SLionel Sambuc {
45*11be35a1SLionel Sambuc atf_tc_set_md_var(tc, "descr",
46*11be35a1SLionel Sambuc "Test that random(3) does not always return the same "
47*11be35a1SLionel Sambuc "value when the seed is initialized to zero");
48*11be35a1SLionel Sambuc }
49*11be35a1SLionel Sambuc
50*11be35a1SLionel Sambuc #define MAX_ITER 10
51*11be35a1SLionel Sambuc
ATF_TC_BODY(random_same,tc)52*11be35a1SLionel Sambuc ATF_TC_BODY(random_same, tc)
53*11be35a1SLionel Sambuc {
54*11be35a1SLionel Sambuc long buf[MAX_ITER];
55*11be35a1SLionel Sambuc size_t i, j;
56*11be35a1SLionel Sambuc
57*11be35a1SLionel Sambuc /*
58*11be35a1SLionel Sambuc * See CVE-2012-1577.
59*11be35a1SLionel Sambuc */
60*11be35a1SLionel Sambuc srandom(0);
61*11be35a1SLionel Sambuc
62*11be35a1SLionel Sambuc for (i = 0; i < __arraycount(buf); i++) {
63*11be35a1SLionel Sambuc
64*11be35a1SLionel Sambuc buf[i] = random();
65*11be35a1SLionel Sambuc
66*11be35a1SLionel Sambuc for (j = 0; j < i; j++) {
67*11be35a1SLionel Sambuc
68*11be35a1SLionel Sambuc (void)fprintf(stderr, "i = %zu, j = %zu: "
69*11be35a1SLionel Sambuc "%ld vs. %ld\n", i, j, buf[i], buf[j]);
70*11be35a1SLionel Sambuc
71*11be35a1SLionel Sambuc ATF_CHECK(buf[i] != buf[j]);
72*11be35a1SLionel Sambuc }
73*11be35a1SLionel Sambuc }
74*11be35a1SLionel Sambuc }
75*11be35a1SLionel Sambuc
ATF_TP_ADD_TCS(tp)76*11be35a1SLionel Sambuc ATF_TP_ADD_TCS(tp)
77*11be35a1SLionel Sambuc {
78*11be35a1SLionel Sambuc
79*11be35a1SLionel Sambuc ATF_TP_ADD_TC(tp, random_same);
80*11be35a1SLionel Sambuc
81*11be35a1SLionel Sambuc return atf_no_error();
82*11be35a1SLionel Sambuc }
83